公开(公告)号：WO2023089707A1

公开(公告)日：2023-05-25

申请号：PCT/JP2021/042318

申请日：2021-11-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： LEBRETON, Pierre ,  YAMAGISHI, Kazuhisa

IPC: H04N19/126 ,  H04N19/154 ,  H04N19/179 ,  H04N19/196

Abstract: A coding parameter computation device includes a processor; and a memory that includes instructions, which when executed, cause the processor to execute the following steps: decomposing an original video into scenes and selecting one scene of the decomposed scenes; generating encoded scenes by applying a plurality of combinations of bitrates and resolutions to the selected one scene; evaluating a quality of each of the encoded scenes; estimating, for the one scene, a relationship between a quitting ratio and a bitrate; obtaining quitting ratio values by applying the relationship to throughput historical data of the one scene; calculating N discrete quantization values of the quitting ratio values by applying a clustering algorithm; and identifying combinations of a bitrate, a resolution, and a quality value corresponding to the N discrete quantization values.

公开(公告)号：WO2023275512A1

公开(公告)日：2023-01-05

申请号：PCT/GB2022/051567

申请日：2022-06-20

Applicant: SONY GROUP CORPORATION ,  SONY EUROPE B.V.

Inventor： BROWNE, Adrian Richard ,  KEATING, Stephen Mark ,  SHARMAN, Karl James

IPC: H04N19/136 ,  H04N19/196 ,  H04N19/13 ,  H04N19/50 ,  H04N19/176 ,  H04N19/12 ,  H04N19/14 ,  H04N19/18

Abstract: A data encoding method comprises generating one or more encoding parameters; communicating the one or more encoding parameters for use by a decoding process; and encoding data items representing image data samples of an image by generating residual data indicative of a difference between an image data sample and a predicted version of that image data sample, the encoding step performing the encoding in dependence upon the one or more encoding parameters generated by the generating step; in which the generating step comprises deriving an estimate of the residual data in respect of at least a subset of the image data samples and generating the one or more encoding parameters in dependence upon the derived estimate.

公开(公告)号：WO2022259614A1

公开(公告)日：2022-12-15

申请号：PCT/JP2022/004998

申请日：2022-02-09

Applicant: ソニーグループ株式会社

Inventor： 宮城　雄介 ,  藤本　勇司

IPC: H04N19/119 ,  H04N19/154 ,  H04N19/176 ,  H04N19/196

Abstract: 本開示は、符号化効率の低減を抑制しながら主観画質の低減を抑制することができるようにする情報処理装置および方法に関する。 画像を符号化する際にその画像に対応する量子化係数に対してZeroOutを適用することによる復号画像の主観的画質への影響力を推定し、その画像の符号化における処理単位となるブロックのサイズを設定する際に、その推定された影響力に基づいて、ブロックの分割を制御する。本開示は、例えば、情報処理装置、符号化装置、電子機器、情報処理方法、またはプログラム等に適用することができる。

公开(公告)号：WO2021236060A1

公开(公告)日：2021-11-25

申请号：PCT/US2020/033540

申请日：2020-05-19

Applicant: GOOGLE LLC

Inventor： JOHN, Sam ,  ADSUMILLI, Balineedu ,  GADDE, Akshay

IPC: H04N19/14 ,  H04N19/179 ,  H04N19/196 ,  H04N19/40

Abstract: A learning model is trained for rate-distortion behavior prediction against a corpus of a video hosting platform and used to determine optimal bitrate allocations for video data given video content complexity across the corpus of the video hosting platform. Complexity features of the video data are processed using the learning model to determine a rate-distortion cluster prediction for the video data, and transcoding parameters for transcoding the video data are selected based on that prediction. The rate-distortion clusters are modeled during the training of the learning model, such as based on rate-distortion curves of video data of the corpus of the video hosting platform and based on classifications of such video data. This approach minimizes total corpus egress and/or storage while further maintaining uniformity in the delivered quality of videos by the video hosting platform.

公开(公告)号：WO2021202000A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/018099

申请日：2021-02-15

Applicant: TENCENT AMERICA LLC

Inventor： CHOI, Byeongdoo ,  LIU, Shan ,  WENGER, Stephan

IPC: H04B1/66 ,  H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/196

Abstract: A method, computer program, and computer system is provided for coding video data. Video data including a current picture and one or more other pictures is received. A first flag corresponding to whether the current picture is referenced by the one or more other pictures in a decoding order is checked. A second flag corresponding to whether the current picture is output; is checked. The video data is decoded based on values corresponding to the first flag and the second flag.

公开(公告)号：WO2021122555A1

公开(公告)日：2021-06-24

申请号：PCT/EP2020/086159

申请日：2020-12-15

Applicant: ZTE (UK) LIMITED

Inventor： WU, Ping

IPC: H04N19/33 ,  H04N19/46 ,  H04N19/467 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172 ,  H04N19/176 ,  H04N19/119 ,  H04N19/167 ,  H04N19/184 ,  H04N19/196 ,  H04N19/96

Abstract: Methods, apparatus and systems for video bitstream generation and parsing are described. One example bitstream decoding method includes parsing a portion of a video bitstream at a video unit level for a first field indicative of whether a slice height is specified for a subpicture partitioning or for a tile partitioning at the video unit level, parsing, due to determining that the first field indicates that the slice height is specified for the subpicture partitioning, N second fields in the portion of the video bitstream to obtain heights for rectangular slices in the video unit, wherein the heights are indicated in multiple of coding tree unit (CTU) heights, and wherein each rectangular slice comprises one or more CTU rows that belong to a same subpicture, wherein N is a positive integer, and decoding, based on the first field and/or the N second fields, the video bitstream to generate a video.

公开(公告)号：WO2021045656A2

公开(公告)日：2021-03-11

申请号：PCT/RU2020/050405

申请日：2020-12-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  CHERNYAK, Roman Igorevich

Inventor： SOLOVYEV, Timofey Mikhailovich ,  KARABUTOV, Alexander Alexandrovich ,  IKONIN, Sergey Yurievich ,  ALSHINA, Elena Alexandrovna

IPC: H04N19/196 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/179 ,  H04N19/1887 ,  H04N19/61

Abstract: A method for decoding of a video bitstream implemented by a decoding device, wherein the video bitstream includes data representing one or more sequence parameter set, SPS, flags, the method comprising: for an SPS flag of the one or more SPS flags, obtaining two variables of the SPS flag, respectively, by parsing the video bitstream, wherein the value of one variable of the two variables is the minimum allowed value of the SPS flag, and wherein the value of the other variable of the two variables is the maximum allowed value of the SPS flag; obtaining the SPS flag, by parsing the video bitstream; evaluating whether the value of the SPS flag is valid based on the values of the two variables; and in case that the value of the SPS flag is valid, decoding the video bitstream according to the value of the SPS flag.

公开(公告)号：WO2020180704A1

公开(公告)日：2020-09-10

申请号：PCT/US2020/020441

申请日：2020-02-28

Applicant: VID SCALE, INC.

Inventor： LUO, Jiancong ,  HE, Yuwen ,  CHEN, Wei

IPC: H04N19/196 ,  H04N19/513 ,  H04N19/52

Abstract: Systems and methods are described for video coding using affine motion prediction. In an example method, motion vector gradients are determined from respective motion vectors of a plurality of neighboring sub-blocks neighboring a current block. An estimate of at least one affine parameter for the current block is determined based on the motion vector gradients. An affine motion model is determined based at least in part on the estimated affine parameter(s), and a prediction of the current block is generated using the affine motion model. The estimated parameter(s) may be used in the affine motion model itself. Alternatively, the estimated parameter(s) may be used in a prediction of the affine motion model. In some embodiments, only neighboring sub-blocks above and/or to the left of the current block are used in estimating the affine parameter(s).

公开(公告)号：WO2020068662A1

公开(公告)日：2020-04-02

申请号：PCT/US2019/052417

申请日：2019-09-23

Applicant: TENCENT AMERICA LLC

Inventor： LI, Xiang ,  XU, Xiaozhong ,  LIU, Shan

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/172 ,  H04N19/70

Abstract: Aspects of the disclosure provide method and apparatus for video coding. In some examples, an apparatus includes receiving circuitry and processing circuitry. The processing circuitry decodes, from a coded video bitstream, a syntax element for an adjusted version of an initial quantization parameter (QP) value at a picture level for a picture. The adjusted version is in a range with an upper boundary that is changed with a maximum QP value. Then, the processing circuitry determines the initial QP value of a segment (such as a slice, a tile, a group of tiles and the like) in the picture based on the syntax element and determines a QP value for a block in the segment according to the initial QP value of the segment and adjustments associated with the block. Then, the processing circuitry performs an inverse quantization on quantized data of the block according to the determined QP value.

公开(公告)号：WO2020068175A1

公开(公告)日：2020-04-02

申请号：PCT/US2019/032574

申请日：2019-05-16

Applicant: TENCENT AMERICA LLC

Inventor： WENGER, Stephan ,  LIU, Shan

IPC: H04N19/124 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61 ,  H04N19/91

Abstract: A method for adjusting a quantizer parameter (QP) value of a block of samples in a planar source picture that is input to an encoder for encoding may include identifying information associated with the planar source picture that is a projection of a non-planar surface. The method may include determining an initial QP value associated with the block of samples in the planar source picture. The method may include determining, based on the information associated with the planar source picture, a QP delta value associated with the block of samples. The method may include determining a final QP value associated with the block of samples based on the initial QP value and the QP delta value. The method may include coding the block of samples using the final QP value.